To Remove And Replace The Acquisition Board ( Oscilloscope Board For Hp 1660As-Series) - HP 1660 Series Service Manual

Replacing Assemblies
To remove and replace the acquisition board (and oscilloscope board for HP 1660AS-series)
To remove and replace the acquisition board (and oscilloscope
board for HP 1660AS-series)
Using previous procedures, remove the following assemblies:
1 1
•
Handle
•
Rear Feet
•
Cover
•
Rear Panel
Disconnect the sweep cable from acquisition board.
2 2
Disconnect the CPU board interface cable by pressing down on the cable release
3 3
tabs on the cable socket located on the board.
Disconnect the power supply cable.
4 4
For the HP 1660AS-series instruments, remove the hex nut from the oscilloscope
5 5
input attenuators on the lower front panel.
Slide the mounting plate out the rear of the instrument.
6 6
Verify that the cable release tabs are down to slide the mounting plate out, then slide the
mounting plate toward the rear out of the chassis.
Separate the acquisition board from the mounting plate by removing the screw at the
7 7
center of the board.
For HP 1660AS-series instruments, separate the oscilloscope board from the
8 8
mounting plate by removing the screw at the center of the board. Remove the
oscilloscope-to-acquisition board cable.
For HP 1660AS-series instruments, remove the attenuators from the mounting plate
9 9
by removing the mounting screws (two per attenuator) from the underside of the
board. Then carefully lift the attenuator straight off of the board.
Reverse this procedure to install the acquisition board.
10 10
Check that the following assemblies are properly installed before installing the acquisition
board:
•
Monitor
When installing the mounting plate, check that the alignment tabs on the mounting plate are
installed in the alignment holes in the inside bottom, front of the chassis.
6–10